Audio Joiner

Join multiple audio files into a single track — useful for podcasts, DJ sets and audiobook chapters. Re-encodes to MP3 to smooth over mixed formats, all locally.

100% free No uploads Runs in your browser No signup

Join audio files

Drop a file to processProcessed by FFmpeg compiled to WebAssembly — entirely on your device

Tracks are concatenated in selection order and re-encoded to MP3, which smooths over mixed formats and sample rates. For gapless albums, prefer files that already share the same format and bitrate.

How to use the Audio Joiner

1
Open the tool above — it is already running, no install or account needed.
2
Enter your input and adjust the options to match what you need.
3
Copy or download the result — everything was processed locally in your browser.

Private by design

This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.

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